Combining the best materials and construction with a smarter engagement system, M-pulse hubs are built to roll smoother longer. The heart of M-pulse hubs is the magnetic locking engagement system based on the innovative Project321 design and manufactured in their small-batch, high-precision facility in Bend, Oregon. M-pulse freehubs feature six pawls equipped with Neodymium magnets engaging every 1.66° with more force than traditional spring-based pawl designs and less resistance when coasting. With less friction and drag, M-pulse hubs spin more freely to roll further faster, and with less effort.
Why are Magnets Better?
All hubs suffer from momentum-robbing drag as you coast, but when it comes to creating the most efficient and reliable ratchet system, pulling is better than pushing. Conventional mechanical pawl springs are constantly attempting to push the pawls into the ratchet ring. Those push springs are weakest when fully extended, as the teeth of the pawl engage with the teeth of the ratchet ring, but as you coast and the teeth of the pawl disengage and move down out of the teeth of the ratchet ring, push springs compress and exert even more pushing force. This creates significant drag and friction.
Unlike these inefficient mechanical push spring systems, M-pulse hubs use the pull force of Neodymium magnets to reduce drag to the absolute minimum, while still being able to engage with reliable precision the instant you push on a pedal. Magnetic pull springs are at their strongest when the pawl is engaged and are weakest during coasting, the ideal scenario to reduce drag. Project321’s patent pending placement of the powerful but small rare earth magnets let the pawls self-align quickly and consistently during engagement while creating a hub with almost no rotational resistance when coasting.
The M-pulse hub's six magnetic pawls and hardened steel ratchet ring are also built to outlast conventional mechanical springs, which can fatigue, lose tension, and become misaligned over time. With better durability, stronger engagement, and less drag, the M-pulse design is a better way to build a hub.
- Neodymium rare earth magnetic spring provides stronger engagement with less drag
- 7075-T6 hub shells and axles can withstand years of high torque use
- Fully shielded Enduro bearings with custom grease fill for long life and low resistance
- U.S. machined and assembled precision 6-pawl freehub with extremely fast 1.66° engagement
- Adjustable preload allows longer bearing life and lower friction to roll smoother
- Available in Shimano Micro Spline, HG, and SRAM XDR, 6-bolt and Centerlock, with options to fit most axle widths
More than Just Smart
Because an innovative design is only as good as its materials and construction, each detail of the M-pulse hub has been engineered to systematically eliminate weaknesses found in traditional pawl and ratchet style hubs. The new M-pulse hub starts with the most simple and durable version of Project321’s magnetic pawls, and features an all new freehub body and main seal design for outstanding protection from the elements. The hub rolls on Enduro bearings with a custom grease fill optimized for low resistance, and every bearing on the M-pulse hub is shielded, meaning no bearing seal is directly exposed, for smooth rolling in all conditions and increased bearing life. The 17mm axles are made of 7075 aluminum and roll on long-lasting Enduro brand bearings that feature custom-tuned grease fills that reduce resistance. A double-row main freehub bearing was chosen after tests proved it to be more durable than two individual, separate bearings. Multiple teeth on each pawl provide a greater surface area to distribute load to improve engagement, and the angle of the pawls was optimized to distribute stress away from the rotating bearings for added durability under high torque.
Beyond the strength and speed of engagement, M-pulse hubs feature adjustable preload that decreases drag and resistance for less effort and more speed. Adjustable preload also prolongs bearing life by allowing the hub's bearing tension to be tuned with greater precision in contrast with most hubs that tension unevenly by relying solely on how much the bike’s axle has been tightened. A precision piece of equipment deserves the option of precise tuning, and the M-pulse hub's adjustable preload, available on both the front and the rear hub, delivers that level of tuning precision.
With their quality materials and construction, M-pulse hubs are backed by a 5-year warranty.
M-pulse hubs are available on MK4, CB7, and Podium series wheelsets, and are offered with Shimano Micro Spline, HG, or SRAM XDR freehubs, 6-bolt or Centerlock brake style, and options to fit all popular axle configurations.